Corrosion resistance, high hardnessThe 304 stainless steel ring is made of high quality raw materials. No rust, corrosion resistance, high hardness, non-toxic and non-polluting environment. Safe and SturdyCommercial-grade swing hangers are designed for children and adults, rated for 450 kg (1 pc) for residential use, they are safe. Easy to installWe have pre-drilled two holes for bolting to wooden or concrete beams. Includes 2 concrete anchors and 2 hex bolts. Pre-drilled expansion screws for concrete applications can be installed in minutes. Indoor and Outdoor UseSuitable for indoor and outdoor use, suitable for concrete ceilings and wooden beams. wood, wider range of use. Ideal as a wall hook for sling trainers, suspension trainers, swing sets, punching bags or for hanging any heavy object on the hanger. Package included 2 round durable stainless steel eyelets with loops, 8 anchor screws, 2 stainless steel spring hooks.